3.4.22.26 down arsenic trioxide downregulates cancer procoagulant activity in MCF-7 and WM-115 cell lines in vitro and inhibits the proliferation of MCF-7 and WM-115 cells in vivo. all-trans Retinoic acid (ATRA) downregulates the expression of cancer procoagulant in breast cancer cells. Cancer procoagulant activity assay, overview 753332